body,
html {
  width: 100%;
  height: 100%;
  background: #f0f0f0;
  box-sizing: border-box;
  font-family: Helvetica, Arial, 'sans-serif';
  font-size: 62.5%;
  font-weight: 400;
}
body * {
  box-sizing: inherit;
}

.cf:before,
.cf:after {
    content: " ";
    display: table;
}

.cf:after {
    clear: both;
}
